Sand-blast apparatus.



J. P. HAY.

SAND BLAST APPARATUS, APPLICATION FILED 0G'I'. l7, 1904.

PATENTED FEB; 11, 1908.

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J. F. HAY" SAND BLAST APPARATUS. APPLICATION FILED OCT. 17,-1904.

wune/weo I UNITED STATES PATENT oFFIoE.

JOHN F. HAY, OF ERIE; PENNSYLVANIA ASSIGNOR TO ERIE llIALLEABLE IRON COMPANY,

OF ERIE, PENNSYLVANIA, A CORPORATION.

SAND-BLAST APPARATUS.

Specification of Letters Pate nt.

Patented Feb. 11, 1908.

Application filed October 17. 1904. Serial No. 228.896.

To all whom it "may concern: Y

- Be it'lmown that 1, JOHN F. HAY, a citizen of the United States,- residing at Erie, in the county of Erie and State of Pennsylvania,

5 have invented new and useful Improvements in Sand-Blast Apparatus, of which the following is a specification.

This invention relates to sand blast apparatuses and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims.

Sand blast apparatuses have heretofore been made. In the usual construction, a sand pipe is arranged at right angles to a horizontal air pipe and the mingled sand and air are conveyed considerable distances to the point of use. I have found that a defleeting partition at the outlet of the sand passage will effect a more even delivery of sand to the blast than with the construction just described. I have'also found it desirable to mingle the air and sand adjacent to the nozzle, this giving a more satisfactory con trol than where the sand is carried by the air long distances This also reduces the wear on the pipes or walls of the passage. In order that the nozzle so supplied may be readily hand led for use on large castings, l have made the connections to said passage flexible, so that the nozzle may be directed as desired.

The invention is illustrated in the accompanying drawings as follows Figure 1 shows a side elevation of the preferred construction. Fig. 2, a vertical section of the mixer and nozzle on the line 22 in Fig.

i Fig. 3, a section on the line 3 -3 inFig. 2. Fig. 4 is a side elevation partly in section showing some features of the invention ada ted to a mill. Fig. 5, an end. elevatior of t e same. Fig. 6, a section through the mixer and nozzle used with the mill.

The mixer A comprises the two passages c and b, the sand-being delivered through the passage 0 and the air through the passage b. The deflecting partition it extends at an angle to the passage C into the outlet passage (1 of the mixer. This partition is preferably arranged at an angle approximating 45 dehe usual nozzle A is arranged in the outlet passage a, the outlet passage forming the throat of the nozzle.

Theflexible connection Bcxtcnds from the rees tothe general line of the sand passage.

supply pipe B, the supply pipe B being con-.

sand or in other words to effect a choking of the sand.

In the alternative construction, shown in Figs. 4, 5 and 6 D marks the mill, A the mixer in which is arranged the passages I) and c, the passage 0 being for the sand and thepassage b for the air, and the deflecting partition (1 operating to deflect the air so as to prevent its direct action on the column of sand in the passage 0. The outlet passage a forms the throat of the nozzle A as in the preferred construction. The operation of this is practically the same as in the preferred construction, the supply of air being controlled by a valve B, and the being directed into the mill against the castings as the mill is revolved. This is termed a sand blast apparatus and the term sand where it occurs in the claims is meant to include any abrading material. What I claim as new is 1. In a sand'blast apparatus the combination of a mixer comprising a sand passage for delivering sand to the nozzle by gravity the end of the passage being deflected from the general direction of the sand passage to form a support for the sandwith the passage arranged in a vertical direction and anIair passage arranged beneath the deflected end of the sand passage with the sand passage back of the end in a vertical position; and a nozzle withwhich the mixer communicates, said nozzle being deflected to a'direction more nearly 45 degrees to the sand passage back of the deflected end than-to a direction in alincment therewith.

2. In asand blast apparatus the combination of a vertically disposed flexible sand connection; a mixer secured to the flexible connection comprising a sand passage for delivering sand to the nozzle by gravity the end of the passage being deflected from the general direction of the sand passage to form a support for the sand with the passage arranged lll" in a vertical direction and an air passage arranged beneath the deflected end of the sand passage with the sand. passage back of the end in a vertical position; and a nozzle with which the mixer communicates, said nozzle being deflected to a direction more nearly 45 derees to the sand passage hack of the deected end than to a direction in alinenien't therewith.

3, In a sand blast apparatus the combination of a mixer comprising the sand passage 0 and air passage 6 with the interposed partition a extending entirely across the nozzle and forming the deflected end of the passage JOHN F. HAY. Witnesses:

C. D. HI BY, B. J. WALKER. 

